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Over the past several months, Mozilla ran an agentic harness powered by Claude Mythos Preview across Firefox’s source code, identifying 271 security bugs that were fixed in Firefox 150, with additional fixes shipped in versions 149.0.2 and 150.0.1. Over 100 people contributed code to get those patches out. The bugs spanned a wide range of subsystems. Among the disclosed reports: a 15-year-old flaw in the HTML <legend> element, a 20-year-old XSLT bug involving reentrant key() … More →
The post What Mozilla learned running an AI security bug hunting pipeline on Firefox appeared first on Help Net Security.
CISA has issued an urgent warning regarding a critical vulnerability in Palo Alto Networks PAN-OS. Tracked as CVE-2026-0300, this severe security flaw was recently added to CISA’s Known Exploited Vulnerabilities catalog on May 6, 2026. The vulnerability allows unauthenticated threat actors to execute arbitrary code and gain root privileges on affected firewall appliances, prompting immediate […]
The post CISA Warns of Palo Alto PAN-OS Vulnerability Exploited to Gain Root Access appeared first on Cyber Security News.
Cisco has issued a critical security advisory regarding a high-severity vulnerability impacting its Crosswork Network Controller (CNC) and Network Services Orchestrator (NSO). Tracked formally as CVE-2026-20188 with a CVSS base score of 7.5, this flaw poses a significant risk to network infrastructure. If successfully exploited, the vulnerability allows unauthenticated, remote attackers to trigger a severe […]
The post New Cisco Network Vulnerability Let Remote Attacker Cause DoS Attack appeared first on Cyber Security News.